Looks like they went with extending their existing __fastcall calling convention. http://blogs.msdn.com/b/oldnewthing/archive/2004/01/02/47184.aspx http://blogs

Looks like they went with extending their existing __fastcall calling convention. http://blogs.msdn.com/b/oldnewthing/archive/2004/01/02/47184.aspx http://blogs.msdn.com/b/oldnewthing/archive/2004/01/02/47184...